paschall



J. H. PASCHALL.

MILLING ATTACHMENT FOR LATHES.

APPLICATION men SEPT. 10. I91].

1,318,688. Patented Oct. 14, 1919.

44- 44 Wren/or p" i f mes lZ-P schaI/ JAMES PAscHALL, ornone A H, CALIFORN A, ASSIG-NOR To PASCH-ALL TOOL- OOMIEANY, Q15 LONG BEACH, CALIFORNIA, n CORPORATION or CALIFORNIA,

MILLING ATTACHMENT non LATHES;

spccification L s Patent Patented Oct. 14, 1919.

. Annl igation filed; September 10, 1917. Serial No. 190,518.

To all whom it may concern:

Be it known that I;',,JAM;ES,H.. PAso An a citizen of the United States, residing at Long Beach, in the county of LosAngeles, State of california haue invented new and useful Improvements Milling. Attach.- ments. for Lathes of which: theffolloyving is a specification... i V V p This invention relates; to attachments, for lathes with, the object in. View of providing a simple and eflicient means, and inexpensive, which may be applied, to. an, ordinary lathe to perform. certain milling opera,- tions; it being l Object. to. -provide aathe. at achment; enabling a mall sh p to carry on themostusual and the simpler forms of. milling, operations,

This inventionrefens more particulanly to certain, improvements, upon my invention for which Letters Patent No. 1,216,60Qwas granted. to meon Febr ary 2 ,;1-9 -7- These,

particular improvements explained, here inafter. For the purposeof," setting. forth, t e impr vements. fins escribe a p ferred form. of. deViGfi5. nd; then, particularly set for h he immense which. e he specific; subject niattQI-JQf this application; For this purpose I refer to the accompany.- ing drawings. in which? 1 I Figure 1 isa perspectiue illustnating my milling attachmentasitappearscin use on. the lathe; Fig. 2 is, a side elevation ofv the attachment; Fig, 3 is a vertical; longitudinal. section of the same; Fig. 4 is a rear elevation of the attachment; and Eig, 5. is. a. plan of the attachment. p p

' In. the drawings a lathe carriage is lllll-r strated at 1Q,having{the usual: tool supporting member 11 and tool post 12. I attach ment' is mounted upon the member 11 in the manner. shown. The vertical. base member: 13 of the attachment preferably has a solid mounting plate 1d projectinghorizontally rearwardly rfrom the base member 13; andthis angular mountingyplate 14. has a large central aperture 14:? adaptedto. receivev thetool post. 12. I i

A bar 15"is placed horizontally in thetool post. and is. forcedgdown on; the, plate 14-, forcing the under, surface to-a t ght engage, ment With the upper fiat surface of member 11. .Theundersurfaoe l'i oflthe plate 14 is machined accurately; so that when the plate 14.- is; held 'thus in. position, the: milling at:

tachment is held accurately in proper position upon the lathe.

The base member 13 has a vertical face 16 against which theway member 17 is held; the tWo vinterengaging faces 'of the base member and Way member being accurately machined. Theiway member 17 is mounted upon,a"hori-zo'ntal central pivot 18 and is swingingly adjustable about said pivot on the face-16,. Slots 19 extend through the base memberl3, and bolts 20'pass through said slots and screw into the Way member; and, byloosening and. tightening these bolts,

the memberl? may be thrown to and set in any desired angular position. The lower bolt; 20 may bear back against the vertical side face of carriage member 11; and there is sufficlent space between the base member 13 and the carriage to insert a wrench-to turn the bolt. The-lower bolt need only be turned slightly; it does not haveto be turned up excessively tightly, but. only enough to hold the Way member 17 back against the face 16; the upper bolt 20 is tightened up sufficiently to hold the ay member in any angular position. Although I" herein de- Scribe a bolt and slot means of holding the Waymember in position on the base,it Will beseen that any. other equivalent means may be used. The means-of indicating the angularity of position is an. improvement and is spoken of particularly hereinafter In its normal; central. position the member 17 is so-secured that the Ways 25 thereon are vertical. The work holding member 26 slides vertically in the Ways 25, a screw 27 and, a hand wvheel 28 providing means for moving the Work carrying member vertically to any desired position. Work carrying member has a Work clamp com risin a lower 'aW 29 stationarilf mounted upon the member 26 (preferably integral. therewith) and an upper jaw 30 adapted to be pressed down by a screw 31 mountedv in, a boss 32 projecting from the upper end; of the member 26; The Work The clamp is particularly designedfor holding, such antieles as.- shafts, as shown. at 33 in the drawings, holding such articles across the-axis of the l2 tt l1 6;011= WhlCl1 the attachment is. mounted, Such, articles maybe held; in either. horizontal or inclined positions.

-: The; upper/jaw I now: prefer to make relatively fiat, with its notch not so deep as the notch in the lower jaw. And I make the upper jaw loose, not attached to the screw 31, so that it may be put in place after the work is in place; and so that it may be used in different positions. For in stance, it may be turned over and its flat surface clamped down on any piece of work that has a flat upper face; or it may be turned on edge to reach down farther into the lower jaw to hold a small article.

hen I specify herein a work holding means or clamp I do not necessarily mean that the work is held directly in the clamp. It may be held in a chuck (an index chuck may be used) which is held in the clamp.

One of the improvements herein concerned is the means for setting the member 17 to any desired inclined position. Upon the upper end of member 17 I now place a circular-edged flange 40, whose edge is concentric with the pivot pin 18 and is provided with an angle scale 41. A pointer projection 42 extends upwardly from the member 13; and the angularity of position of the member 17 may be readon the scale 41 against a line or mark 41 on the projection 42. The provision of this scale greatly facilitates the accurate performance of the kinds of millin work for which the attachment is designed. For instance, if a surface or slot is to be milled at an angle to the axis of a shaft, this can easily be accomplished by turning the member 17 to the proper angle.

Another improvement has been hereinbefore partially described. I now make the part 14 in the form of a'fiat plate instead of in the form of two prongs, as heretofore. This flat plate gives good strength and gives a good lower surface for engagement with the carriage member 11. Furthermore, I drill dowel pin holes 44 through the plate 14 and in these holes I insert a pair of dowel pins, as shown at 45 in Fig. 1, which fit into correspondingly drilled holes in the carriage member 11. These pins lock the attachment from any accidental displacement in a horizontal direction. The attachment is thus held immovable upon the lathe carriage. Another feature of improvement is in the manner of mounting and connecting the ver tical screw 27. This screw 27 extends into a central vertical recess 22 in the way mem-' vertically and keep the hand wheel 28 above the. upper end of the member 17, the hand wheel 28 is provided with a relatively long shank 28 This arrangement of the screw, traveling with member 26, provides that the clamp screw 31 shall not interfere with the screw handle 28 nor with the operators hand. The screw 31 sometimes projects quitehigh above the boss 32, and if the screw 27 remained stationary on the member 17, then at times the clamp screw 31 would be moved up into interference with the handle 28, unless the handle shank .28 were made still longer.

In order to accurately indicate the sliding position of member 26 on member 17, I provide the member 17 with a finely divided scale 50 which may be read against a mark 51 on member 26. And, further, I provide the screw 27 with a micrometer head 52 which may be read against a mark 53 on the upper end of member 26.

I have found my milling attachment to be a very efiicient and economical means for performing the simple sorts of milling oper ations ordinarily desired to be done in the average machine shop. The particular im-' provements herein described make the de vice more fully satisfactory in its operation and capable of a larger variety of more accurate work. The present invention resides particularly in these improvements and the general and specific combinations of which they form a part. In the other features the device may be modified and changed without necessarily departing from the invention.

My attachment virtually converts a lathe into a milling machine; and without interfering with the ordinary use of the lathe, because the attachment is easily mounted and removed. And it may be used for operations other than millin operations; it may be used to hold work for lathe operations, or to hold a tool to work on a piece held in a lathe chuck, etc.

Having described a preferred form of my invention, I claim:

In a device of the character described, a

base member having a horizontally project.

ing mounting plate with an aperture therethrough to receive a tool post of a lathe carriage and other apertures to receive pins set in the lathe carriage to lock the base member against horizontal displacement, a work carrying .member, and means for mounting the work carrying member on the base member to allow it vertical movement and pivotal movement with reference thereto. r

In witness that I claimthe foregoing I have hereunto subscribed my name.

. JAMES H. PASCHALL.

copies or this patent may be obtained for five cents each, my addressing the; Commissioner of Patents, Washington, D. G. 

